Things are progressing nicely on the M3 front with Gintani recently recording 828 horsepower at the crank in a manual E90 M3. The car has a low compression built motor (compression will not be revealed at this time) and hit 16.5 psi of boost from a Vortech YSI. The blower has more in it and could likely be overspun to the 22 psi range but for now 828 horsepower at 16.5 psi is very impressive and more than anyone has made up until today. Expect to see more out of these Stage III cars, like BimmerBoost's own project M3, in the next few weeks.